This adds running autogenerate.js prior to any commit. If there are
any changes in the generated files, the autogenerate.js script exits
with a non-zero exit code, causing the commit to fail, and telling the
user to add those changed files to the commit before trying the commit
again.

I created this PR because I have noticed many commits where the
documentation hadn't been generated, then a later commit does generate
it which results in messy commits with unrelated changes. This should
ensure that any changes to generated files are committed with the actual
changes that caused them.

* documentation module no longer needs to be globally installed

* use npx to run documentation

This makes it clear that we're using our installed version of
documentation rather than a globally installed one. It was finding our
project's version fine without using npx, but this is probably better.

* FIX-236 iOS snapshot manager by setting snapshotter to __block variable

* FIX-236 Also deallocate from error block

* Allow toggling of snapshot logo for Android

* Allow disable logo for Android snapshot manager

* Update tests

* Update documentation and add info to CONTRIBUTING.md about documentation generator

* [INFRA] Organization rename

* [INFRA] Fix missing change, update getting started docs

* [INFRA] Use Travis CI for publishing to NPM

[Doc] Update contribution file